Hehe, it's very simple. When you make a firm offer, you don't do it in the way of making a simulation disk.

For example, if you make a simulation disk and lose a little money, but you think the direction is right, you will hold your position. Finally, it made a profit.

In the firm offer, if you make a slight loss, you will doubt your original judgment and stop loss. In this way, you lose the profit you could have. This is the problem of mentality. Everyone cannot avoid it.